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Cheap flights from Chiang Mai to Ko Samui from £151

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20/8. Fares are subject to change and may not be available on all flights or dates of travel.
CNX — USM
3 Sep — 10 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Chiang Mai to Ko Samui

Enter your travel dates to find the best prices.

Cheapest flights from Chiang Mai to Ko Samui
Explore the most affordable flight options available from Chiang Mai to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 August 2026.

Thu 10/922:30
CNX
-
USM
1 stop8h 40m
Multiple Airlines
Sun 13/908:55
USM
-
CNX
Nonstop1h 45m
Multiple Airlines
Deal found 2/8£174
Thu 3/919:05
CNX
-
USM
1 stop12h 05m
Multiple Airlines
Mon 7/908:55
USM
-
CNX
Nonstop1h 45m
Multiple Airlines
Deal found 31/7£178
Wed 16/915:45
CNX
-
USM
1 stop5h 05m
Multiple Airlines
Wed 23/908:55
USM
-
CNX
Nonstop1h 45m
Multiple Airlines
Deal found 2/8£197
Tue 1/922:30
CNX
-
USM
1 stop9h 00m
Multiple Airlines
Tue 8/908:55
USM
-
CNX
Nonstop1h 45m
Multiple Airlines
Deal found 31/7£201
Wed 7/1013:55
CNX
-
USM
1 stop4h 35m
Multiple Airlines
Sun 11/1007:50
USM
-
CNX
1 stop5h 50m
Multiple Airlines
Deal found 3/8£207
Thu 3/920:00
CNX
-
USM
1 stop11h 30m
Bangkok Airways
Tue 15/908:55
USM
-
CNX
Nonstop1h 45m
Bangkok Airways
Deal found 1/8£215

Find flight deals from Chiang Mai to Ko Samui

Discover tips and strategies to find the most affordable flight options for your journey from Chiang Mai (CNX) to Ko Samui (USM). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 4 August 2026.

Round-trip from

£174

One-way from

£151

Popular in

December

Cheapest in

June

Average price

£365

Good one-way deal

£207 or less
Bangkok Airways
  • Bangkok Airways
  • 10/9-13/9
  • 1 total stop
  • 10h 25m total
  • Chiang Mai to Ko Samui
Search Deals
Bangkok Airways
  • Bangkok Airways
  • 20/8
  • 1 total stop
  • 12h 15m total
  • Chiang Mai to Ko Samui
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£36 potential increase over avg. return price).
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Cheapest flight prices on average. 4% potential price decrease (£10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
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Price to beat on a one-way flight from Chiang Mai to Ko Samui.
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Cheapflights Fare Finder

 
Customise your flight search to find flights from Chiang Mai to Ko Samui that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 4 August 2026.
Use the filters below to find and compare flights from Chiang Mai to Ko Samui that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Wed 7/10

13:55-18:30

1 stop4h 35m

Ko Samui

Sun 11/10

07:50-13:40

1 stop5h 50m

£207

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Thu 3/9

20:00-07:30

1 stop11h 30m

Ko Samui

Tue 15/9

08:55-10:40

Nonstop1h 45m

£215

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Wed 16/9

15:45-20:50

1 stop5h 05m

Ko Samui

Wed 23/9

06:00-11:20

1 stop5h 20m

£220
Fastest return journey

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Wed 13/1

12:10-17:00

1 stop4h 50m

Ko Samui

Wed 27/1

08:50-10:40

Nonstop1h 50m

£222

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Mon 7/9

11:55-07:10

1 stop19h 15m

Ko Samui

Sat 12/9

08:55-10:40

Nonstop1h 45m

£225

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Mon 7/9

10:10-07:10

1 stop21h 00m

Ko Samui

Mon 14/9

08:55-10:40

Nonstop1h 45m

£225

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Tue 25/8

20:00-07:00

1 stop11h 00m

Ko Samui

Sun 6/9

08:55-10:40

Nonstop1h 45m

£239

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Tue 25/8

20:00-07:00

1 stop11h 00m

Ko Samui

Thu 10/9

08:55-10:40

Nonstop1h 45m

£239
Cheapest one-way

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Thu 27/8

14:35-20:25

1 stop5h 50m

£161

Chiang MaiKo Samui

CNX - USM

CNXUSM

Chiang Mai

Sat 22/8

20:00-07:30

1 stop11h 30m

£165

Flights are sorted by cheapest return flights first.

Deals found on 1/8

Showing 1-10 of 18 resultsSorted by cheapest first
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Best time to book a flight from Chiang Mai to Ko Samui

Have a flexible travel schedule? Discover the best time to fly to Ko Samui from Chiang Mai with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Chiang Mai to Ko Samui

What is the cheapest month to book a flight from Chiang Mai to Ko Samui?

Currently, June is the cheapest month in which you can book a flight from Chiang Mai to Ko Samui (average of £187). Flying from Chiang Mai to Ko Samui in December is currently the most expensive (average of £431). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from CNX to USM?

Find hourly flight availability from Chiang Mai to Ko Samui. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 4 August 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Chiang Mai to Ko Samui as you normally would.

How much does it cost for a return flight from Chiang Mai to Ko Samui?

Airfare is below average for this route at the moment.

Chiang Mai to Ko Samui flights typically cost between £321 and £471 in September.
The cheapest return price found within the last 5 days was £174 on Multiple Airlines (10 Sept–13 Sept).

Related info for your journey

Find useful and relevant information for your journey from Chiang Mai to Ko Samui. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How popular is this Chiang Mai to Ko Samui flight route?

    Flights from Chiang Mai to Ko Samui have been viewed 7 times in the past calendar month.

  • How long is the flight from Chiang Mai to Ko Samui?

    Bangkok Airways can get you from Chiang Mai to Ko Samui in just under 11h 30m. Your travel time can differ by up to . Chiang Mai and Ko Samui are separated by a distance of 641 mi.

  • What are the most reliable airlines from Chiang Mai to Ko Samui?

    No one likes to see their flight delayed. When booking a flight from Chiang Mai to Ko Samui consider choosing Bangkok Airways (77%), EVA Air (75%) or Thai Airways (75%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Chiang Mai to Ko Samui?

    Looking for the cheapest flight from Chiang Mai to Ko Samui? While on average our users pay £220, our data indicates the cheapest price to be £206. The most popular route (Chiang Mai - Ko Samui), is priced around £366.

  • Can I find deals for flights from Chiang Mai to Ko Samui that include hotel bookings?

    Yes. In addition to deals on Chiang Mai to Ko Samui flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Chiang Mai to Ko Samui?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Chiang Mai to Ko Samui.

  • Can I find deals for business class flights from Chiang Mai to Ko Samui?

    Yes. Cheapflights offers flight deals from Chiang Mai to Ko Samui by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Chiang Mai to Ko Samui?

    Currently, June is the cheapest month in which you can book a flight from Chiang Mai to Ko Samui (average of £187). Flying from Chiang Mai to Ko Samui in December is currently the most expensive (average of £431). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Ko Samui?

Book flights to Ko Samui if you plan to visit one of these locations
Ko Pha Ngan
Ko Tao
Khanom

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Why should you use Cheapflights to find cheap flight tickets from Chiang Mai to Ko Samui?

Cheapflights helps you find that perfect flight to Ko Samui from Chiang Mai by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Chiang Mai to Ko Samui with no change fees?

Need flexible booking options for your flight to Ko Samui from Chiang Mai? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Chiang Mai to Ko Samui become cheaper?

Yes, Cheapflights offers price alerts on Chiang Mai to Ko Samui flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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